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Metal organic framework reverse osmosis membrane and preparation method thereof

A technology of metal-organic framework and reverse osmosis membrane, which is applied in the direction of semi-permeable membrane separation, chemical instruments and methods, membrane technology, etc., can solve the problems of high system energy consumption, low flux, and high energy consumption of seawater membrane method, and achieve operational Simple, low manufacturing cost, and the effect of improving throughput

Active Publication Date: 2018-08-28
VONTRON TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problem of high energy consumption of seawater membrane method, the present invention aims to provide a high flux and low energy consumption seawater desalination reverse osmosis membrane and its preparation method
It has the characteristics of solving the technical problem of high energy consumption of the system caused by the low flux of the reverse osmosis membrane in the prior art

Method used

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  • Metal organic framework reverse osmosis membrane and preparation method thereof

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Embodiment 1

[0034] A method for preparing a metal-organic framework reverse osmosis membrane, comprising the following steps:

[0035] (1) Preparation of metal-organic frameworks: Silver nitrate and N,N-dimethylformamide (DMF) were ultrasonically dispersed for 10 min at a mass ratio of 1:38, trimesic acid and N,N-dimethylformamide Amide (DMF) was ultrasonically dispersed for 10 minutes according to the mass ratio of 1:38, the two were mixed and ultrasonicated for 1 hour, centrifuged and filtered, and the obtained solid was washed 3 times with a mixture of water and ethanol (V water: V ethanol = 1:1), After drying at 60 °C for 24 h, the obtained metal organic framework nanomaterials were kept in a vacuum desiccator until use.

[0036] (2) Preparation of the support layer: mix and disperse 0.15wt% polyvinylpyrrolidone and N,N-dimethylformamide (DMF), and stir at a stirring speed of 60r / min, so that the polyvinylpyrrolidone is Disperse evenly in N,N-dimethylformamide (DMF) solution, maintai...

Embodiment 2

[0041] A method for preparing a metal-organic framework reverse osmosis membrane, comprising the following steps:

[0042] (1) Preparation of metal-organic frameworks: Silver nitrate and N,N-dimethylformamide (DMF) were ultrasonically dispersed for 10 min at a mass ratio of 1:38, trimesic acid and N,N-dimethylformamide Amide (DMF) was ultrasonically dispersed for 10 minutes according to the mass ratio of 1:38, the two were mixed and ultrasonicated for 1 hour, centrifuged and filtered, and the obtained solid was washed 4 times with a mixture of water and ethanol (V water: V ethanol = 1:1), After drying at 60 °C for 24 h, the obtained metal organic framework nanomaterials were kept in a vacuum desiccator until use.

[0043] (2) Preparation of support layer: 1wt% polyvinylpyrrolidone and N, N-dimethylformamide (DMF) are mixed and dispersed, and the stirring speed is 70r / min for stirring treatment, so that polyvinylpyrrolidone is in N , Disperse evenly in the N-dimethylformamide ...

Embodiment 3

[0048] A method for preparing a metal-organic framework reverse osmosis membrane, comprising the following steps:

[0049] (1) Preparation of metal-organic frameworks: Silver nitrate and N,N-dimethylformamide (DMF) were ultrasonically dispersed for 10 min at a mass ratio of 1:38, trimesic acid and N,N-dimethylformamide Amide (DMF) was ultrasonically dispersed for 10 minutes according to the mass ratio of 1:38, the two were mixed and ultrasonicated for 1 hour, centrifuged and filtered, and the obtained solid was washed 4 times with a mixture of water and ethanol (V water: V ethanol = 1:1), After drying at 60 °C for 24 h, the obtained metal organic framework nanomaterials were kept in a vacuum desiccator until use.

[0050] (2) Preparation of support layer: mix and disperse 2.5wt% polyvinylpyrrolidone and N,N-dimethylformamide (DMF), and stir at a stirring speed of 75r / min, so that polyvinylpyrrolidone Disperse evenly in the N,N-dimethylformamide (DMF) solution, maintain the st...

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Abstract

The invention relates to the technical field of reverse osmosis membrane modification and especially relates to a metal organic framework reverse osmosis membrane and a preparation method thereof. According to the metal organic framework reverse osmosis membrane disclosed by the invention, a metal organic framework and a polymer function layer are combined; a high flux and low energy consumption seawater membrane with a reverse osmosis membrane thickness as 100nm can be prepared through preparation steps of a polymer supporting player, a metal organic framework nanoparticle, a seawater membrane function layer and the like and by adjusting technological parameters in a preparation process. By means of existence of the metal organic framework, a lot of hydrogen bonds are provided for the function layer; the metal organic framework further can perform crosslinking condensation polymerization with free amino in the function layer, so that a crosslinking degree of the reverse osmosis membrane is improved. The seawater reverse osmosis membrane has a thinner membrane thickness, and manufacturing cost is greatly saved; more importantly, under the premise that a salt removing rate is not affected, membrane flux is greatly improved; thus, operation energy consumption of the seawater membrane is reduced, and the low energy consumption seawater membrane has excellent performance.

Description

technical field [0001] The invention relates to the technical field of reverse osmosis membrane modification, in particular to a metal organic framework reverse osmosis membrane and a preparation method thereof. Background technique [0002] Water is the source of life, and it is an indispensable condition for the survival of human beings, animals and plants. Seawater and brackish water account for more than 97.4% of the world's total water volume. How to desalinate seawater has become the most direct and effective means to solve the lack of water resources. At present, seawater desalination technologies in the world are mainly divided into thermal method and membrane method. Thermal method mainly includes multi-stage flash evaporation (MSF), multi-effect distillation (MED) and vapor compression distillation (VCD); membrane method mainly includes reverse osmosis ( RO) and nanofiltration (NF). Among them, membrane seawater desalination technology, especially seawater revers...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D69/10B01D71/56
CPCB01D67/0006B01D69/105B01D71/56B01D69/107B01D69/1251B01D71/441B01D61/025B01D71/68Y02A20/131B01D69/1071
Inventor 章冰洁康燕梁松苗
Owner VONTRON TECH CO LTD
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